1.National Meteorological Center;2.Center of Earth System Modeling and Prediction of CMA
In this paper, the main characteristics and forecast difficulties of Typhoon "Chaba" in 2022 are analyzed and studied. The main conclusions are as follows: "Chaba" is the first typhoon landing in China in 2022. After landfall, together with the westerly trough, its remnant continues to move northward, and affect central China, East China, North China and Northeast China. The accumulated rainfall is large and the wind is strong. There were several tornadoes around the typhoon. There are three main difficulties in forecasting. First of all, the problem of accurate positioning of weak typhoons is outstanding. Introduction of new satellite products will improve the positioning accuracy. The track deviation of the 72 h forecast is mainly caused by the inaccurate NWP of the key systems, such as the east one of binary typhoons, Continental high, South Asia high and Westerly jet. The prediction of the remnant maintenance after typhoon landing needs to pay more attention to the continuous adjustment of water vapor channel and high-level outflow conditions.